Which of the following is the best explanation for why carbon easily forms many bonds?

a. because it has four electrons available for bonding
b. because it forms negative ions
c. because it forms positive ions
d. because it has six electrons available for bonding

As a small change in a person's dna can cause a genetic disorder

The variation among individuals, on which natural selection acts

Look at the illustration of four letters from the american manual alphabet. decide whether the description of the letter is a good definition. if not, choose a counterexample. the letter i is formed by sticking up the smallest finger and folding all the other fingers into the palm of your hand with the thumb folded over them while keeping your hand still.